RAI - Request-Answer-Interface

rai is a node.js module to easily generate text based command line servers.
When a client sends something to the server, the first word of the line is
treated as a command and the rest of the line as binary payload.

In addition to line based commands, there's also a data mode, to transmit
everygting received. And there's also an option to switch to TLS mode for
secure connections.

Once the server has been set up, it can start listening for client connections
with server.listen(port[, hostname][, callback]). Callback function gets an error
object as a parameter if the listening failed.